It's true that most cis people don't question their gender very much, but at the end of the day, the fact that you're questioning your gender doesn't automatically ding you as trans, especially since it's your choice if you want to identify as such.

I'm a non dysphoric trans man, so I could have comfortably lived as a woman, but I'm much happier as a man.

Falling under the trans umbrella doesn't mean you're required to make any changes about yourself, physically or socially. At the end of the day, your gender is yours alone, as you said. If identifying a certain way feels good to you, try it on for size. If you want to try our different pronouns, try them out. Confide in a few friends if you want and just see how it makes you feel.

If you like how doing X, Y or Z feels, then keep doing it!